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    <SCript>
         let arr=[2, 6, 6, 1, 77, 52, 25, 7 ,7];
         //4.删除数组中的奇数
        for(let i=0;i<arr.length;i++){
             console.log(arr[i]);
            if(arr[i]%2!=0){
             arr.splice(i,1)
                 i--;
             }     
         }  
         console.log(arr);  
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